AMD Radeon RX 6600M vs AMD Radeon RX 6400

Compare AMD Radeon RX 6600M 8 GB vs AMD Radeon RX 6400 4 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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Specifications
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Benchmark Score

Overall Score

General gaming and workstation score

3903 points

111% significantly better overall score

1845 points

Flux Core frame rate

Volumetric ray casting test, a computationally expensive method of rendering high-quality scenes

92 FPS

50 FPS significantly higher Flux Core frame rate

42 FPS

Electron frame rate

Randomly generated noise sphere test

57 FPS

29 FPS significantly higher Electron frame rate

28 FPS

City frame rate

Procedurally generated city scene with voxel rendering

77 FPS

41 FPS significantly higher City frame rate

36 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

36 FPS

20 FPS significantly higher Clouds frame rate

16 FPS

Free GPU Benchmark

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Other Benchmarks

3DMark Graphics score

High-end graphics benchmark

8165 points

4940% significantly higher 3DMark Graphics score

162 points

Blender score

Cycles Render (Samples per minute)

902.13 points

197% significantly higher Blender score

302.98 points

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

70251 points

109% significantly higher Geekbench 6 (OpenCL) score

33586 points

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

75065 points

82% significantly higher Geekbench 6 (Vulkan) score

41105 points

Specifications

Core Clock Speed

Nominal chip frequency

2068 MHz

7% slightly higher core clock speed

1923 MHz

Boost Clock Speed

Higher turbo frequency when power conditions are met

2416 MHz

4% slightly higher boost clock speed

2321 MHz

Memory

Onboard memory size for textures and vertices

8 GiB

100% significantly more memory

4 GiB

Memory Bus Width

Number of parallel lines to the memory chips

128 Bit

100% significantly larger memory bus width

64 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

224 GB/s

75% significantly higher memory bandwidth

128 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

100 W

53 W

88% significantly lower TDP

Pixel Rate

Number of pixels that can be rendered per second

154.6 Gigapixels/s

108% significantly higher pixel rate

74.3 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

274.2 Gigatexels/s

146% significantly higher texture rate

111.4 Gigatexels/s

Floating Point Performance

Raw number of floating point operations per second

8.77 TFLOPS

145% significantly better floating point performance

3.57 TFLOPS

Shading Units

Number of processors dedicated to shader processing

1792

133% significantly more shading units

768

Texture Mapping Units

Number of processors dedicated to applying textures

112

133% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

100% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

126th of 586

217th of 586

Family

The product line

Radeon RX 6000 Series

Release date

The official date of release of this chip

2021 May

2022 January

Memory Type

The type of memory used by this chip

GDDR6

DirectX Support

Maximum version of DirectX supported

12.0

OpenGL Support

Maximum version of OpenGL supported

4.6

Radeon RX 6600M vs Radeon RX 6400 comparison

For gaming, the Radeon RX 6600M graphics card is better than the Radeon RX 6400 in our tests.

In our comparison, the Radeon RX 6600M has a slightly higher core clock speed. This is the frequency at which the graphics core is running at. While not necessarily an indicator of overall performance, this metric can be useful when comparing two GPUs based on the same architecture. In addition, the Radeon RX 6600M also has a slightly higher boost clock speed. The boost clock speed is the frequency that the GPU core can reach if the temperature is low enough. The allows for higher performance in certain scenarios.

As stated by the manufacturer, the Radeon RX 6600M has significantly more memory with 8 GiB of memory compared to 4 GiB. Lots of memory is good when playing at high resolutions or with many monitors.

In addition, the Radeon RX 6400 has a significantly lower TDP at 53 W when compared to the Radeon RX 6600M at 100 W. This is not a measure of performance, but rather the amount of heat generated by the chip when running at its highest speed.

In terms of raw gaming performance in our GPU benchmark, the Radeon RX 6600M is better than the Radeon RX 6400.